Screen



Jan. 10, 1928.

P. MUELLER SCREEN Original Filed Dec. 19, 1919 O O O O OO OO 00 00 Pfiili) MLLBZZBT;

This application is a division from an ap- Patented Jan. 10, 1928.

UNITED. STATES PATENT OFFICE.

PHILIP MUELLER,:OE nEoA'rUIt'frLLINo s, ASSIGNOR ro. ADOLPH MUELLER,Tnns'rnn, IOEIDEICATUR, ILLINOIS.

' SCREEN.

Original application filed December 19, 1919, Serial No. 345,929.Divided and this application flied I .J'anuary 29, 1921.

and has particular reference toscreens for water .Stlttllll'S-Of thegeneral typedlsclosed in Letters Patent to Henry Mueller894.-,'O35,granted, July 21, 1.908.

plication Ser.'No. 845,929, filedby me December19, 1919,.being dividedtherefrom under requirement of the Commissioner of Patents a v e It is apurpose of this invention to provide a screen of this type which maybecheaply and expeditiously made which is strong and rigid; and which isso-constructed as to ensure maximum life under working conditions. a V

In the following description of the present preferred embodiment of thisinvention the above and other various objects and advantages of thisinvention will be more clearly brought out, the same being shown in theaccompanying drawings, wherein ,Figure 1 is a plan view of one fermofblank from which the screen of the strainer may be constructed. r q

, Figure 2 is a side elevational view of my improved screen attached tothe rod which maintains the screen in position in the easmg.

Figure 3 is a sectional view of a screen made of a single piece of metaldrawn to shape and then perforated.

Figure 4t is a sectional view showingthe lapped joint of the meetingedges of the screen blank leaves of Fig. 3.

I Figure 5 shows another method of securing the screen to the retainingrod.

Referring to the drawings, wherein like nmnerals represent like parts inthe several views, my improvedsereen is constructed from a single blankof perforated sheet metal having a central portion and a plurality ofradiating Wings or leaves. The blank shown in Figure 1 resembles a Romancross, in that it has a central portion 11' and four wings or leaves 12;but it is to be understood that the screen may be made up from a blankhaving more or less than four leaves. Preferably, each of the wings orleaves increases in width toward its outer end, so "that, when thescreen is finally formed, the leaves will overlap. The outer edges ofthe leaves may be rounded, as shown, so that they will all punch press.cost of; manufacture.

Serial 'NO. 440,944. 5

lie in thev same plane when theleaves are bent to form-the finishedscreen.

The screen maybe formed in any suitable manner, for example, in anordinary In forming my improved screen from the blank, the leaves 12 arebent toward each other about a mandrel with the corresponding edgefofeach leaf overlapping theadjacent edge of the next leaf; vThe leaves12, when in this position, are subjected to great pressure so that thelayers of metal are com pressed. and the wall of thest-rainer brought toa uniform thickness throughout. By constructing. the strainer in themanner described, the leaves reinforce each other along the lines of theoverlaps and a strainer. of considerable strength is obtained.

The top or closed end of the screen is dented at a centralpoint, asat13, so as to provide a small, centrally disposed recess or indentatlonfor the receptlon of one end of a rod 1 L Wl11Cl1 serves to support thescreen This materially reduces the in-position, when used in a strainerof the type shown inthe Henry Mueller patent referred to.

It is to beg noted thatby connecting the retaining wire or rod 14 to thescreen 15 in the manner described, there is no danger of the rod beingforced out of place by the pressure of the spring portion of the wire.The recess in the bulged portion 18 forms a pocket in which the solderand upper end of the rod 14: are firmly seated, and therefore, theadhesive power of the solder is not solely relied upon to maintain thewire or rod 14 in place.

In Fig. 3 I have shown the screen as formed in a manner slightlydifferent from that heretofore described. In this form the screen isdrawn from a blank 16 instead of being stamped out, and, after it isbrought to proper shape is perforated; it being im-. practicable tofirst perforate and then draw a blank because of the danger ofdistorting the perforations.

In Fig. 5thescreen is secured to the retaining rod 17 by crimping orspinning the tip 18 into a groove 19 formed in the rod, so as to lockthe parts together.

The construction shown gives a screen which has all of the desirablefeatures of strength, and simplicity of construction,

while by practicing the method disclosed screens may be made at aminimum outlay of time and labor and a consequent reduced cost.

hile I have shown a particular construc-.

tion and method it will be understood that such changes as are withinthe range of mechanical skill may be made and still be within the rangeof my invention.

I claim:

1. A filtering screen comprising a substantially cone shaped receptacleformed from a blank having a central portion and a plurality ofradiating leaves which increase =over-lapping the adjacent edge of theadja cent leaf.

4. A filtering screen comprising a central portion and a plurality ofleaves radiating therefrom which increase in width towards their outerends, the leaves being bent towards each other with the edge of a leafoverlapping the adjacent edge of the adjacent leaf, the metal of theover-lapping edges of said leaves being reduced'so that the walls of thescreen are substantially of uniform thickness.

resets;

A filtering screen having a longitudinally disposed overlapped sectioncompressed to give greater rigidity to said screen.

6. A filtering screen having a longitudinally disposed and overlappedsection of substantially the same thickness as the screen, and ofgreater rigidity than the body of the screen. 7

7. A filtering screen, having at spaced intervals a plurality ofsuperposed layers of metal compressed to give rigidity thereto.

8. A filtering screen having at spaced intervals a plurality ofsuperposed layers of metal compressed and disposed longitudinallythereof to give rigidity thereto.

9. A filtering screen, the wall of which of uniform thicknessthroughout, having at spaced intervals a plurality of compressed layersof metal to give rigidity thereto.

10. A filtering screen comprising a central portion and a plurality ofleaves radiating therefrom, said leaves having their edges overlapping.

11. A filtering screen comprising a central portion and a plurality ofleaves radiating therefrom, said leaves having their edges overlapping(and the metal of the overlapping edges of said leaves being reduced sothat the walls of the screen are substantially of uniform thickness.

12. An article of the class described forn'ied from a blank and having aportion formed of superposed layers of material compressed to reducesaid portion to substant-ially the same thickness as said blank.

In'testimony whereof I have hereunto set my hand.

' PHILIP MUELLER.

